So enthralled was Fedorovna with the piece--an enameled egg with a golden yoke, golden hen, miniature diamond crown and ruby egg inside--that the czar commissioned a new egg every Easter.

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Every local claims that the island they live on is the real diamond in the crown.

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In a famous incident, Galina took a fancy to an antique diamond-studded crown in a museum in Tbilisi, the Georgian capital.

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The Darya-e Nur, meaning sea of light, at 185 carats (37 g), the largest and finest diamond of the crown jewels of Iran came from the mines.

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The crown is topped with the Montblanc diamond (0.05 ct, F-G color).

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The 34.98-carat Beau Sancy diamond, the signature gem of the Prussian crown jewels, has made it through the last three turbulent centuries firmly in the hands of the House of Hohenzollern, the ruling dynasty of Prussia and, later, imperial Germany.

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Also on display is the miniature crown worn by Queen Victoria for her official Diamond Jubilee portrait in 1897.

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The most storied piece on offer is a diamond pendant hair ornament formerly in the collection of the French crown jewels.

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Topped with a crown made entirely from sugar, the cake reflects the Silver, Gold and Diamond Jubilees, the Royal Navy, the Army and Royal Air Force.

BBC: Diamond Jubilee cake baked for Queen